new CRT TV display issues

[maiki]

Is it possible to adjust this display issue that my new CRT TV has...? It's a low end TV so obviously it's acceptable but....

I try to demostrate the issue on this picture I made... it's a sort of ghosting that bleeds from left to right in some colour combinations its more apparent than the others... sometimes its barely visible...

You can partly eliminate it by playing with brightness but it depends on the colour combination really so it's not really that helpful in the end

I was just wondering what exactly causes this... and if I could fix it...

[Jack Burton]

If you are only seeing this against black backgrounds then it is completely normal. 

If you're seeing it on a screen with full colors then something is wrong. 

Playing in the dark exaggerates this phenomenon.

[maiki]

Someone told me that it is a cheap design of the analogue video amplifier or whatever, and that is has to do with ability to quickly change the levels of brightness... I am really not into this... But for sure we have a bigger CRT TV that hasn't got this issue... And yes, it does that ghosting also on other colours, it depends... if there is a large area of one colour you can see some "bleeding" from the left.. you won't notice this on photos etc. but in video games where you get lots of simplified graphics.. yes...

[maiki]

Actually what about this... seems to be my problem (the title)

11.25) Bleeding highlights

On very bright areas of the picture, one or more colors may bleed to
the right resulting in a trail of those colors. The difference between
this problem and the section: "Trailing lines in one or more colors" is
that in this case, only highlights are affected.

One cause of this is that the color gain, contrast, or intensity controls
(whatever they are called on your monitor) are set too high. See the section
on: "Brightness and color balance adjustment". Check the settings of any
brightness limiter controls as well.

http://www.tvfreak.cz/forum/externalredirect.php?url=http://www.repairfaq.org/REPAIR/F_monfaqa.html

[Kevin Mullins]

I'd turn the contrast down and see what happens.

[maiki]

I was playing with the contrast already... but I don't think its the problem...

[grantspain]

background colours can cause this also dying crt or bad caps or neck card earth missing

[maiki]

I decided to make a few realtime shots with the mobile phone. So that you can see what it looks like. Bare in mind it is not that apparent in real, it is just that the phone makes it more extreme, but even better for you to see the issue.

brightess set a bit higher by purpose; contrast/colour settings have no effect on the issue
as I said when I put down the brightness it will disappear but once the game generates non-black background its back again->
notice the meteor & ship bleeding - this one is also quite apparent in realtime


any bright object will cause quite noticable bleeding unless you put brightess down to pure black...



Bare in mind this is a brand new budget CRT TV. As you mentioned, this issue might be caused by electronics design flaw, some bad part inside the set, or bad service picture settings. I prey it is not caused by CRT screen itself, as this is a brand new product. I also managed to get inside service menu. The chassis should be AK56, here is the service manual with some video settings values - I have no clue if this might help or not...

http://monitor.espec.ws/download.php?id=22816


And I forgot to mention that this is PAL Sega Mega Drive running through RGB video cable and I have no other leads to test other formats like composite or RF. But I assume this is not an issue of RGB input only.

Anyway, by putting the brightness down to pure black and increasing contrast the results are quite satisfactory - no bleeding - at least at games that use black backgrounds. This issue tends to be apparent in games that use simple graphics with large single coloured areas.